In my experience, it takes around a year to sell software to a large company. I have seen it getting done in three months, but it is very seldom. Therefore, my question is whether you know of any software, which you believe could get sold to a whole department within one week. My reason for asking is that I am interested in creating or acquiring such software and use it to gain a first presence in the company. From there, I could sell other software so much easier by calling them upgrades, plug-ins etc.
EDIT: I am talking about software, which runs locally in the enterprise, and not a cloud solution.